I fired up my old iPhone 3G to use as a gaming-device and MP3-player not too long back. I updated to latest iOS it would support, which iirc is iOS 4.2.1.

Interested in seeing how the iOS-development had been, I decided to enable all the features Apple had decided to disable. Basically a quick rooting with redsn0w where I only re-enabled the official features and I didn't add any 3rd-party hackware to compensate or otherwise distort the experience.

I still feel it is stagnant, but like I said, I realize this may be a personal preference. Just thought I'd clear up any confusion regarding my ability (and inability) to use iOS-features as they are available as per today.